The following table gives an approximate comparison between the different exams.
CEF level
Cambridge
IELTS level
TOEFL iBT
TOEIC
Michigan
LTE
C2
CPE
7.5 +


ECPE
level 5


7.0
100



C1
CAE
6.5
90
880

level 4


6.0
80



B2
FCE
5.5
70

ECCE
level 3


5.0
60



B1
PET
4

550

level 2
A2
KET
3



level 1
.. and here is another table grouping the exams according to General English, Academic English or Business English:
A2
B1
B2
C1
C2
General English exams
KET
PET
FCE
CAE
CPE


ECCE


LTE 1
LTE 2
LTE 3
LTE 4
LTE 5
Academic English




ECPE


------------------ IELTS ------------------


------------------ TOEFL ------------------
Business English

------------------ TOEIC ------------------

BEC P
BEC V
BEC H

------------------ BULATS ------------------

EfB 1
EfB 2
EfB 3
EfB 4

EfC 1
EfC 2
EfC 3